It seems the authors did not find evidence of a "pink tax":
"Finally, while our findings do NOT support the existence of a pink tax as conceived by regulators, a more expansive definition of the pink tax could include differences in markups across men’s and women’s products."
"...our finding that women’s personal care products are not systematically more expensive than substantially similar men’s products calls into question the role of government intervention to reduce the pink tax."
"Finally, while our findings do NOT support the existence of a pink tax as conceived by regulators, a more expansive definition of the pink tax could include differences in markups across men’s and women’s products."
"...our finding that women’s personal care products are not systematically more expensive than substantially similar men’s products calls into question the role of government intervention to reduce the pink tax."